Safety razor blade



Feb. 17, 1942. A. L. GuMP SAFETY RAzoR BLADE' Filed Nov. 29, 1940 QVVENTORT W M A 7' TOR/VE Y.

Patented Feb. 17, 1942 UNITED STATES PATENT OFFICE SAFETY RAZOR BLADE Abraham L. Gump, San Francisco, Calif.

Application November 29, 1940, Serial No. 367,781

3 Claims.

This invention relates to improvements in safety razor blades, and it has for its primary object i the provision of a razor blade which is so proportioned as to enable a user to shave either closely or in the normal way.

Another object of my invention is to provide a double edge razor blade adapted to be used in the normal way with Safety razors of the "Gillette" type, and which is so constructed as to permit a user to shave closely with one edge of the blade and less closely or in the normal manner with its other edge.

Other and further objects of my invention will be pointed out hereinafter, indicated in the appended claims, or Will be obvicus to one skilled in the art upon an understanding of the present disclosure. For the purpose of this application, I have elected to show herein certain forms and details of a double edge Safety razor blade representative of my invention; it is to be understood, however, that the embodiment of my invention herein shown and described is for the purpose of illustration only, and that therefore it is not to be regarded as exhaustive of the variations of the invention, nor is it to be given an interpretation such as might have the effect of limiting the claims short of the true and most comprehensive scope of the invention in the art.

In the accompanying drawing:

Fig. 1 is an enlarged plan view of a safety razor blade embodying the principles of my invention,

showing the outline of a safety razor in dotted lines; and

Fig. 2 is an enlarged end view of the blade, showing the razor on which it is mounted in dotted lines.

Shown in dotted lines is a Safety razor of the nates a flexible blade of substantially rectangular shape having a suitable longitudinally disposed opening 6 of such a shape and size as to receive the usual projecting member of the cap 3 which holds the blade in place and prevents the displacement thereof. The blade 5 is provided with straight and parallel longitudinally disposed shaving edges 1 and 8 which are positioned at unequal distances from the longitudinal opening 6. To better illustrate and describe the blade construction there is shown on Fig. 1 a longitudinally disposed dotted line 6' which represents the central longitudinal axis of the opening B. The distance between the line 6' and the shaving edge 'l is designated by the numeral 9, while the distance from the other shaving edge 8 to the said line is designated by the numeral IO. It will be noted that the width of that portion of the blade designated by the numeral lO is somewhat shorter than the width of the portion of the blade designated by the numeral 9. When the blade is held in a clamped position between the head 2 and the cap 3, the shaving edge 'l will be positioned closer to the ends of the adjacent guard teeth 4 than is the shaving edge 8 positioned with respect to its adjacent guard teeth. The distance of a Cutting edge of a razor blade with respect to the ends of the adjacent guard teeth ordinarily is a factor determining the particular kind of a shave to be had. By decreasing to a certain point the distance between the shaving edge of the razor blade vand the ends of the adjacent guard teeth, a closer shave can be obtained. Thus by having the shavng edge 1 fairly near the ends of its adjacent guard teeth 4, a close shave can be had by using this particular side of the razor. By having the shaving edge 8 positioned at the normal distance from its adjacent guard teeth 4, a normal or comparatively less close shave is obtained with this particular side of the razor.

The relative positions of the shaving edges 1 and 8 with respect to the longitudinal opening 6 may vary in accordance with the type of razor with which the blade is used, but for all practical purposes it is found that a satisfactory close shave can be obtained if the width of the particular "abnormal part of the blade is not more than one thirty-second of an inch greater than the width of the opposite or other part. In any event the blade should be so proportioned that the particular part having the greatest width is such that its shaving edge does not extend beyond the ends of the adjacent guard teeth and preferably not quite to the ends thereof.

Having described my invention, what I claim is:

1. A Safety razor blade comprising a thin fiat metal member having substantially parallel cutting edges at its opposite sides, and an opening between its shaving edges for receiving projecting means on the razor for normally preventing the displacement of the blade with respect to the 3. A Safety razor blade comprising a fiat and substantially rectang'ular shaped metal member having longtudinally disposed means near the central longitudinal axis of the rectangular shaped member for Cooperating with complementary means on a safety razor for preventing the displaoement of the blade in the razor, the said longitudinally disposed means of the said member being substantally parallel to the shavng edges and positioned slightly closer to one of said edges than to the other.

ABRAHAM L. GUMP. 

